/*
 * ConnectBot: simple, powerful, open-source SSH client for Android
 * Copyright 2007 Kenny Root, Jeffrey Sharkey
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.iiordanov.pubkeygenerator;

import com.trilead.ssh2.crypto.Base64;

/**
 * @author Kenny Root
 */
public class XmlBuilder {
    private StringBuilder sb;

    public XmlBuilder() {
        sb = new StringBuilder();
    }

    public XmlBuilder append(String data) {
        sb.append(data);

        return this;
    }

    public XmlBuilder append(String field, Object data) {
        if (data == null) {
            sb.append(String.format("<%s/>", field));
        } else if (data instanceof String) {
            String input = (String) data;
            boolean binary = false;

            for (byte b : input.getBytes()) {
                if (b < 0x20 || b > 0x7e) {
                    binary = true;
                    break;
                }
            }

            sb.append(String.format("<%s>%s</%s>", field,
                    binary ? new String(Base64.encode(input.getBytes())) : input, field));
        } else if (data instanceof Integer) {
            sb.append(String.format("<%s>%d</%s>", field, (Integer) data, field));
        } else if (data instanceof Long) {
            sb.append(String.format("<%s>%d</%s>", field, (Long) data, field));
        } else if (data instanceof byte[]) {
            sb.append(String.format("<%s>%s</%s>", field, new String(Base64.encode((byte[]) data)), field));
        } else if (data instanceof Boolean) {
            sb.append(String.format("<%s>%s</%s>", field, (Boolean) data, field));
        }

        return this;
    }

    public String toString() {
        return sb.toString();
    }
}
